I would like to suggest a little thing where if someone on your friends list is in your game, you can upgrade their tower to what ever path. I don't know if this would work out or wouldn't, but I would like to see this happen instead of telling my friends to upgrade it and just do it myself instead.
If it doesn't make sense, then vote in the poll
If it doesn't make sense, then vote in the poll
or an orange
? 
